package org.example.forum.controller;

import io.swagger.v3.oas.annotations.Operation;
import io.swagger.v3.oas.annotations.Parameter;
import io.swagger.v3.oas.annotations.tags.Tag;
import jakarta.servlet.http.HttpServletRequest;
import jakarta.servlet.http.HttpSession;
import lombok.NonNull;
import lombok.extern.slf4j.Slf4j;
import org.example.forum.common.AppResult;
import org.example.forum.common.ResultCode;
import org.example.forum.confing.AppConfig;
import org.example.forum.model.User;
import org.example.forum.services.IUserService;
import org.example.forum.utils.MD5Util;
import org.example.forum.utils.StringUtil;
import org.example.forum.utils.UUIDUtil;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.*;

@Slf4j
@RestController
@RequestMapping("/user")
@Tag(name = "用户接口")
public class UserController {
    @Autowired
    private IUserService iUserService;

    /**
     * 用户注册
     * @param username 用户名
     * @param nickname 用户昵称
     * @param password  用户密码
     * @param passwordRepeat  确认密码
     * @return  返回cuccess信息
     */
    @Operation(summary = "用户注册")
    @PostMapping("/register")
    public AppResult register(@Parameter(description = "用户名") @RequestParam("username") @NonNull String username,
                              @Parameter(description = "用户昵称") @RequestParam("nickname") @NonNull String nickname,
                              @Parameter(description = "密码") @RequestParam("password") @NonNull String password,
                              @Parameter(description = "确认密码") @RequestParam("passwordRepeat") @NonNull String passwordRepeat ){
        //判断输入的密码与再次输入的密码是否相同
        if(!password.equals(passwordRepeat)){
            log.warn(ResultCode.FAILED_TWO_PWD_NOT_S_AME.toString());
            return AppResult.failed(ResultCode.FAILED_TWO_PWD_NOT_S_AME);
        }
        //构造对象
        User user=new User();
        //向对象中设置值
        user.setUsername(username);
        user.setNickname(nickname);
        String salt= UUIDUtil.UUID_32();
        String encryptPassword= MD5Util.md5(password,salt);
        user.setPassword(encryptPassword);
        user.setSalt(salt);
        iUserService.createNormalUser(user);
        return AppResult.success();
    }

    /**
     * 用户登录
     * @param request
     * @param username  用户名
     * @param password  用户密码
     * @return  success
     */
    @Operation(summary = "用户登录")
    @PostMapping("/login")
    public AppResult login(HttpServletRequest request ,
                           @Parameter(description = "用户名") @RequestParam("username") @NonNull String username,
                           @Parameter(description = "密码") @RequestParam("password") @NonNull String password){
        //通过dao层从数据库中拿数据
        User user = iUserService.login(username, password);
        if(user==null){
            //打印日志
            log.warn(ResultCode.FAILED_LOGIN.toString());
            //失败,返回结果
            return AppResult.failed(ResultCode.FAILED_LOGIN);
        }
        //如果session不存在,则创建session
        HttpSession session = request.getSession(true);
        //设置session
        session.setAttribute(AppConfig.USER_SESSION,user);
        //返回成功的结果
        return AppResult.success();
    }

    @Operation(summary = "获取用户详情")
    @PostMapping ("/info")
    public AppResult getUserInfo(HttpServletRequest request,
                                 @Parameter(description = "用户id") @RequestParam(value = "id",required = false) Long id){
        User user=null;

        if(id==null){
            //如果id为空,则从session中获取用户信息
            HttpSession session = request.getSession(false);
            //对session进行校验
            if(session==null||session.getAttribute(AppConfig.USER_SESSION)==null){
                //用户没有登录则返回错误信息
                return AppResult.failed(ResultCode.FAILED_FORBIDDEN);

            }
            //从session中获取用户信息,要进行强转成User
            user=(User)session.getAttribute(AppConfig.USER_SESSION);
        }else {
            //如果id不为空,则调用dao层从数据库中查询用户信息
            user = iUserService.selectById(id);
        }

        //这里要判断user是否为空,就是判断在数据库中有没有拿到要用的数据.
        if(user==null){
            return AppResult.failed(ResultCode.FAILED_USER_NOT_EXISTS);
        }
        return AppResult.success(user);
    }

    /**
     * 退出
     * @param request
     * @return
     */
    @GetMapping("/logout")
    @Operation(summary = "用户退出")
    public AppResult logout(HttpServletRequest request){
        //获取session,不创建session
        HttpSession session = request.getSession(false);
        //判断session是否为空
        if(session!=null){
            //移除掉session中的信息
            session.invalidate();
        }
        return AppResult.success("退出成功");

    }

    /**
     * 修改个人信息
     * @param username 用户名
     * @param nickname 昵称
     * @param gender 性别
     * @param email 邮箱
     * @param phoneNum 电话号
     * @param remark 个人简介
     * @return AppResult
     */
    @Operation(summary = "修改个人信息")
    @PostMapping("/modifyInfo")
    public AppResult modifyInfo (HttpServletRequest request,
                                 @Parameter(description = "用户名") @RequestParam(value = "username",required = false) String username,
                                 @Parameter(description ="昵称") @RequestParam(value = "nickname",required = false) String nickname,
                                 @Parameter(description ="性别") @RequestParam(value = "gender",required = false) Byte gender,
                                 @Parameter(description ="邮箱") @RequestParam(value = "email",required = false) String email,
                                 @Parameter(description ="电话号") @RequestParam(value = "phoneNum",required = false) String phoneNum,
                                 @Parameter(description ="个人简介") @RequestParam(value = "remark",required = false) String remark) {


        // 1. 接收参数
        // 2. 对参数做非空校验（全部都为空，则返回错误描述）
        if (StringUtil.isEmpty(username) && StringUtil.isEmpty(nickname)
                && StringUtil.isEmpty(email) && StringUtil.isEmpty(phoneNum)
                && StringUtil.isEmpty(remark) && gender == null) {
            // 返回错误信息
            return AppResult.failed("请输入要修改的内容");
        }
        // 从session中获取用户Id
        HttpSession session = request.getSession(false);
        User user = (User) session.getAttribute(AppConfig.USER_SESSION);
        // 3. 封装对象
        User updateUser=new User();
        updateUser.setId(user.getId()); // 用户Id
        updateUser.setUsername(username); // 用户名
        updateUser.setNickname(nickname); // 昵称
        updateUser.setGender(gender); // 性别
        updateUser.setEmail(email); // 邮箱
        updateUser.setPhoneNum(phoneNum); // 电话
        updateUser.setRemark(remark); // 个人简介
        // 4. 调用Service中的方法
        iUserService.modifyInfo(updateUser);
        user = iUserService.selectById(user.getId());
        // 6. 把最新的用户信息设置到session中
        session.setAttribute(AppConfig.USER_SESSION, user);
        return AppResult.success();
    }

    @Operation(summary = "修改密码")
    @PostMapping("/modifyPwd")
    public AppResult modifyPassword (HttpServletRequest request,
                                     @Parameter(description = "原密码") @RequestParam("oldPassword") @NonNull String oldPassword,
                                     @Parameter(description = "新密码") @RequestParam("newPassword") @NonNull String newPassword,
                                     @Parameter(description = "确认密码") @RequestParam("passwordRepeat") @NonNull String passwordRepeat) {
        // 1. 校验新密码与确认密码是否相同
        if (!newPassword.equals(passwordRepeat)) {
            // 返回错误描述
            return AppResult.failed(ResultCode.FAILED_TWO_PWD_NOT_S_AME);
        }
        // 2. 获取当前登录的用户信息
        HttpSession session = request.getSession(false);
        User user = (User) session.getAttribute(AppConfig.USER_SESSION);
        // 3. 调用Service
        iUserService.modifyPassword(user.getId(), newPassword, oldPassword);

        // 4. 销毁session,让用户重新登录
        if (session != null) {
            session.invalidate();
        }
        return AppResult.success();

    }
}
